Quick shifting and the top trim prevents chain rub in the big/big combination. Merlin's price was by far the best.

Mr Pfeiffer

Previously ridden Shimano 105 and was blown away by how quick and smooth the change is - specially from small to large chain ring. Changes in an instant. Easy to fit with instructions from Shimano's website. Very impressed by this upgrade.

Mr TUNA

Faster shifting than the previous model 6700 or 7900.

Mr Lewis

A quality piece of kit which is hardly any different to top of the range Dura Ace at an extremely good price. Super fast delivery.

raychu

Having riden both SRAM Force and Ultegra, I would say SRAM has the edge here with the yaw technology. Having said that, the trimming works fine on ultegra

PK

Bullet proof and easy to setup. Nice action.

Mr Muller

The main benefit of 6800 is the front derailleur which shifts easier and better under load. It is tricky to set up requiring a very taught cable. Follow the instructions on the web and it works great.